The influence of the electrode length and the voltage pulses on the discharge characteristics of the surface dielectric barrier discharge actuators were investigated numerically by using the plasma kinetic model. The governing equations including the coupled continuity plasma discharge equation, drift‐diffusion equation, electron energy equation, Poisson's equation, and Navier–Stokes equation were solved in quiescent air at atmospheric pressure. The results show that the shorter pulse rising time results in higher discharge characteristics, more intense discharge, and bigger discharge region. Differently, the compared discharge characteristics for the electrodes with different lengths prove that the length of the powered and ground electrodes has little effect on the surface dielectric barrier discharge driven by nanosecond pulsed voltage.

中文翻译：

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单纳秒脉冲表面介电势垒等离子体致动器的特性：几何和电效应

利用等离子体动力学模型，数值研究了电极长度和电压脉冲对表面介质阻挡放电致动器放电特性的影响。控制方程包括耦合的连续性等离子放电方程，漂移扩散方程，电子能量方程，泊松方程和Navier-Stokes方程，它们是在大气压下的静态空气中求解的。结果表明，脉冲上升时间越短，放电特性越高，放电强度越大，放电区域越大。不同地，比较具有不同长度的电极的放电特性证明，通电电极和接地电极的长度对由纳秒脉冲电压驱动的表面介电势垒放电影响很小。